Is cat food unhealthy for dogs? Your dog accidentally eating a bowl of cat food once in a while is no big deal, but eating cat food too often is bad for dogs. A dog's needs are very different from those of a cat, so it will not get enough from cat food alone. WE MORE TIPS Featured • Dog What bone do you give to your dog? Featured • Dog Which dogs are grain-free dog food for? Featured • Dog What dog treats do I give my dog?